I have a problem with this, as it's almost identical to Master Ken's Thrust of Freedom:

But, given that Dustin interprets it as a strike to attackers from behind, but Master Ken is interpreting it as a grab and groin-to-groin strike, perhaps it's not that big of a deal...?

Incidentally, I can't be the only one hoping that Master Ken and his purple belt Todd meet Dustin and Terry sometime, right?

You can watch all of Dustin's awesome videos on his YouTube channel (the board breaking and salt in the eyes training is priceess), you can like his Facebook page, you can follow him on Twitter (as well as his friend Terry) . I'm looking forward to seeing what he comes up with next.